Power-operated glass press



May 11 1926.

E. E. SLICK POWER OPERATED GLASS PRESS Filed Oct. 13, 1925 2 Sheets-Sheet 1 INVENTO E. E. SLICK POWER OPERATED GLASS PRESS Filed Oct. 15', 1925' 2 Sheets-Sheet 2 May 11 1926. 1,584,672

Patented May ll, 1926.

F? E E EDXVIN E. SLICK, OF PITTSBURGH, PENNSYLVANIA.

POWER-OPERATED GLASS PRESS.

Application filed {)ctober '13, 1925. Serial No. 62,241.

The present invention relates to a glass forming machine, and particularly to a press and a power mechanism for operating the plunger of the press.

In certain types of glass forming machines, particularly machines having a single mold, it has always been the practice to operate the plunger of the machine by a long handled lever. The operation of this lever requires considerable work on the part of he operator and it requires that a specially skilled operator be in charge of each machine.

According to the present invention, it is proposed to provide a power actuating means for the plunger which will effectively actuate the plunger and which is so connected with the plunger as to increase the pressure as the plunger reaches the limit of its pressing stroke. It is furthermore proposed according to the present invention to provide a power actuated means which is readily applicable to machines of the type now in wide commercial use without any considerable modification of the construction of the machine.

The invention may be readily understood by reference to the accompany drawings, illustrating a preferred embodiment of the invention, but to the specific construction of which the invention is not confined.

In the drawings:

Figure 1 represents an'end View of a glass press having my invention applied thereto;

Figure 2 is a side elevation of the machine shown in Figure 1;

Figure 3 is a detail view of the trunnion mounting for the ,power cylinder which actuates the plunger.

Referring to the drawings, 2 designates thesupportin'g frame of a glass press. This frame may be of the portable type, being mounted on wheels 3. Carried on the top of the frame is a molds of suitable construc tion. At each side of the mold are vertical posts'5 which may be connected by a cross member 6. Slidable on the upper ends of the posts 5 is a cross head 7 from which depends the plunger rod 8. The plunger rod 8 may also carry the spring plate 9 for the top of the mold.

The construction so far described is of the usual type and the drawings show the plunger in its lowermost position. For raising and lowering the cross head to operate the plunger, a link 10 is provided at each side thereof pivotally connected thereto at 11. The lower ends of the links 10 are pivotally connected to suitable rocking elements, such as the segment shaped plates 12 on the rock shaft 13 in the frame 2. The rock shaft 13 may be operated by means of a pressure cylinder 14, this cylinder operat- 111 a piston rod 15 pivotally connected 'to one of the segment shaped plates 12 at 16. Upon downward movement of the piston rod 15, the cross head 7 is raised and upon upward movement of the piston the cross head is lowered.

The cylinder 14 has a head 17 at the lower end thereof which projects downwardly between ears 18 on a supporting bracket 19. Bolts 20 passing through the ears 18 into the projecting end of the cylinder head provide a pivoting support for the cylinder, so that the cylinder is free to rock with the arcuate travel of the piston rod 15. I have shown but one pressure cylinder 14 located at one side of the machine only, but it will be obvious -that a second cylinder may be provided if desirable.

Upon an examination of Figure 2, it will i be seen that when the plunger is at the lower limitof its movement the pivotal connection '10 between the lower ends of the links 10 and the segments 12 are on a dead center with the shaft 13. According to this arrangement the cross head 7 will 'be'operated at a greater speed when the cross head is near the upper limits of its travel and will be operated at a slower speed when it approac-hes the lowermost position shown in Figures 1 and 2. However, the downward pull of the cross head will be greater as the point '10 'moves into dead center with the shaft 13.

While I have shown segment plates 12 as the preferred form of lever connection be tween the links 10 and the shaft 13 and between the shaft 13 and the piston rod 15, it will be apparent that rocking elements of any suitable shape may be substituted.

I claim as my invention:

1. The combination with a glass press have a reciprocable plunger, a link for moving the plunger, an oscillating element to which the link is eccentrically connected said link and oscillating element being aranged to approach a position of dead center upon the downward movement of the plunger, and a power actuating means connected with said oscillating element.

2. The combination with a glass press having a plunger, a link for moving the plunger, an oscillating rocker to which the link is connected, said link and rocker being on .7 dead center when the plunger is at the limit t) frame and having guide posts at each side of the mold, said guide posts having a reciprocable cross head thereon from which the plunger rod depends, of links pivotally connected to each end of the cross head, a rock shaft in the frame below the mold, a lever element at each end of the rock shaft. a pivotal connection between the lower ends of said links and the lever elements, and a pressure cylinder operatively connected with J the rock shaft.

at. The combination with a glass press having a frame and a mold supported on the frame and having guide posts at each side of the mold, said guide posts having a reciprocable cross head thereon from which the plunger rod depends, of links pivotally connected to each end of the cross head, a rock shaft in the frame below the mold, a segment shaped plate at each end of the shaft, a pivotal connection between each of the said links and the respective segment plates, said pivotal connection being in dead center with the rock shaft when the cross head is in its lowermost position, and a pressure cylinder having a piston operatively connected with one of the segment plates at an angle to the point of connection for the links, whereby the piston is etl'ective through an increasing leverage as the links move into dead center.

5. The combination with a glass press having a frame, a mold thereon, guide posts at each side of the mold, a cross head slidahle on the guide posts, a plunger rod depending from the cross head, a depending link pivot-ally connected to each end of the cross head, a rock shaft in the frame below the mold, a lever element at each end of the rock shaft pivotally connected with said links, a power cylinder pivotally supported on said frame, and a piston rod associated with the cylinder having its free end operatively connected with said rock shaft at an angle to the pivotal connection between the lever elements and the linl's (i. The combination with a glass press having a vertically reeiprocable cross head and having a depending link for operating the cross head, of a rocking element mounted below the cross head with which said link is pivotally connected, the pivotal connec tion for said link with said rocking element being in dead center with the center of rotation of the rocking element when the cross head is in its lowermost position, a cylinder pivotally supported on the pre, and a piston rod associated with the cylinder operatively connected with the rocking element at an angle to the connection between the link and the rocking element.

'7. A glass press including a frame, a supporting bracket on the frame, a trunnion in the bracket, acylinder carried on the trunnion, apiston rod associated with the cylinder, :1 rock shaft in the frame, a lever element on the rock shaft to which the piston rod connects, a mold on the frame, a plunger, :1 cross head from which the plunger depends, and a link operatively connecting the cross head with a lever element on the rock shaft, said link having its connection with the lever element on a dead center with the axis of the shaft when the plunger is in its lowermost position, the said piston acting at an angle to the said links.

8. The combination with a glass press having a mold and a vertically rtaciprocable plunger and having links eccentrically connected with a rock shaft for operating the plunger, of a pressure cylinder having a reciprocable piston, said piston being eccentrically connected with the rock shaft with its eccentric point of connection angularly disposed from the point of connection of the said links, whereby the piston and the links will not simultaneously approach a dead cen ter relation with the rock shaft.

9. The combination with a glass press having a rcciprocable plunger, a link for moving the plunger, an oscillating element to which the link is cccentrically connected, said link and oscillating element being ar ranged to approach a position of dead center upon the downward movement of the plunger, and a power actuating means operatively connected with said oscillating element, said power actuating means being so connected with the oscillating element as to move away from a position of dead center therewith upon the downward movement of the plunger.

In testimony whereof I have hereunto set my hand.

EDTVIX E. SLICK. 

